10CrNi3MoV round tube blank and preparation method and application thereof

A round tube billet and forging technology, which is applied in the field of 10CrNi3MoV round tube billet and its preparation, can solve the problems of welding seam welding quality risk, short service life of equipment structure, and weld seam is easy to be corroded, so as to improve the density and purity , good toughness, and the effect of reducing component segregation

Inactive Publication Date: 2020-09-11
PANGANG GROUP JIANGYOU CHANGCHENG SPECIAL STEEL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Existing high-pressure welded steel cylinders prepared from circular tube blanks of the same type of steel have problems such as weld quality risk, poor performance consistency, weld susceptibility to corrosion, and short service life of equipment structures. The inventors of the present invention found after in-depth research that , the development of high-pressure seamless steel cylinders can effectively solve the above problems, but this puts forward higher requirements for round tube blanks for high-pressure seamless steel cylinders

Method used

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  • 10CrNi3MoV round tube blank and preparation method and application thereof
  • 10CrNi3MoV round tube blank and preparation method and application thereof
  • 10CrNi3MoV round tube blank and preparation method and application thereof

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preparation example Construction

[0024] The first aspect of the present invention provides a kind of preparation method of 10CrNi3MoV round tube billet, and this method comprises the following steps:

[0025] (1) Carry out batching according to formula quantity, after carrying out electric arc furnace smelting, ladle furnace refining, vacuum degassing refining successively, obtain electroslag consumable electrode;

[0026] (2) performing electroslag remelting on the electroslag consumable electrode obtained in step (1) to obtain a steel ingot;

[0027] (3) When the taper of the steel ingot≤1.5%, carry out stress relief annealing to obtain a round tube; when the taper of the steel ingot>1.5%, carry out stress relief annealing, forging and annealing successively to obtain a round tube;

[0028] Wherein, in step (2), based on the total weight of the steel ingot as 100%, the chemical composition of the steel ingot is controlled as follows: C=0.07-0.14%, Si=0.17-0.37%, Mn=0.30-0.60%, Cr=0.90-1.20%, Ni=2.60-3.00%,...

Embodiment 1-3

[0048] (1) Carry out batching according to formula quantity, carry out electric arc furnace smelting, ladle furnace refining and vacuum degassing refining successively, obtain the electroslag consumable electrode that specification is Φ 300mm;

[0049] (2) the electroslag consumable electrode of step (1) gained Φ 300mm specification and the CaF that contains 65% by weight 2 , 20 wt% Al 2 o 3 , 7% by weight of CaO and 8% by weight of MgO in the quaternary electroslag system for electroslag remelting to obtain a steel ingot, the specification of the steel ingot is Φ550mm, and the taper of the steel ingot is 2%. Based on the total weight of the steel ingot as 100%, the chemical composition of the steel ingot is controlled as follows: C=0.07-0.14%, Si=0.17-0.37%, Mn=0.30-0.60%, Cr=0.90-1.20%, Ni= 2.60-3.00%, Mo=0.20-0.27%, V=0.04-0.10%, and the rest are unavoidable impurities and Fe.

[0050] (3) After the steel ingot obtained in step (2) is subjected to stress relief annealing...

Embodiment 4

[0052] Carry out according to the method described in embodiment 1-3, difference is, the taper of the steel ingot obtained in the step (2) is 1%, and in the step (3), the steel ingot only carries out stress relief annealing and obtains round tube billet.

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Abstract

The invention relates to the field of ferrous metallurgy processing, and discloses a 10CrNi3MoV round tube blank and a preparation method and application thereof. The method comprises the following steps that 1, burdening is carried out according to the formula amount, and after electric arc furnace smelting, ladle furnace refining and vacuum degassing refining are carried out in sequence, an electroslag consumable electrode is obtained; (2) electroslag remelting is performed on the electroslag consumable electrode obtained in the step (1) to obtain a steel ingot; and (3) when the taper of thesteel ingot is smaller than or equal to 1.5%, stress relief annealing is conducted, and a round tube blank is obtained; and when the taper of the steel ingot is larger than 1.5%, stress relief annealing, forging and annealing treatment are sequentially carried out, and the round tube blank is obtained. The 10CrNi3MoV round tube blank prepared by the method has high purity, good toughness and excellent formability and corrosion resistance, and can be used for preparing high-pressure seamless steel tubes and high-pressure seamless steel cylinders with excellent comprehensive performance.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgical processing, in particular to a 10CrNi3MoV round tube billet and its preparation method and application. Background technique [0002] 10CrNi3MoV steel has good resistance to seawater corrosion and seawater erosion, and is widely used in the manufacture of marine equipment and environmental equipment. Because of its good toughness, it has a positive effect on the impact resistance and lightweight manufacturing of ships. [0003] At present, the round tube blanks of the same type of steel in China are mainly smelted by converters or electric arc furnaces, and the high-pressure steel cylinders as the final product are mainly manufactured by welding steel plates. The welded high-pressure steel cylinders have poor toughness, weld quality risks, and poor performance consistency. Poor, welds are susceptible to corrosion and short service life of equipment structures. At the same time, high-pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/30C21D6/00C21D9/08C22C33/04C22C38/02C22C38/04C22C38/44C22C38/46
CPCC21D1/30C21D6/004C21D6/005C21D6/008C21D9/08C22C33/04C22C38/02C22C38/04C22C38/44C22C38/46
Inventor 李源叶文冰张健王佳明罗祥华
Owner PANGANG GROUP JIANGYOU CHANGCHENG SPECIAL STEEL
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